MOVE FREELY IN BREATHABLE COMFORT. The Nike Dri-FIT Tank is a breathable, flexible layer that helps keep you cool and moving naturally from your first stretch well into the afterburn. Its lightweight fabric is made with at least 75% recycled polyester. Dri-FIT technology helps you stay dry and comfortable. A Y-back design lets your skin breathe. Standard fit for a relaxed, easy feel. Complete with stretchy elastic straps, curved hem and scoop neck.